Research Of Active Carbon Adsorption To Purify Laser Sculpting Waste Gas

Laser sculpting is a rising industry. The waste gas of Laser sculpting would bring great harm to people's health and environment if it not be purified before released. Laser sculpting industry had many characters such as workshops generally were small and dispersed residential area, which brought huge difficulty to the treatment of laser sculpting waste gas. At present, no paper has been published which about Laser sculpting waste gas's components analysis and purify. The paper utilized the method of active carbon adsorption to purify waste gas of laser sculpting. The paper utilized breakthrough curves and adsorption isotherm to analyze concentration of waste gas and temperature's influence to dynamics and thermodynamics. The paper compared the experimental adsorption isotherm and the model of Langmuir of laser sculpting waste gas on active carbon and confirmed the mechanism of the waste gas on active carbon. The experimentation compared difference method of regeneration, such as heating regeneration, ultrasonic regeneration and microwave regeneration and obtained excellent result of active carbon's regeneration. According to the conclusions, the paper obtained many meaningful results.1. The experiment of dynamics suggested that when adsorption temperature at 10℃, 800 mg·m^-3 waste gas need 250min to penetrate adsorption layer and 800 mg·m^-3 waste gas only need 100min. From the experiment, the paper found that when the concentration of waste gas increased, adsorption layer was penetrated much easier. The slope of breakthrough curves' mass transfer zone increased rapidly if concentration of waste gas increased.2. The experiment of dynamics suggested that the time needed to penetrate adsorption layer shorter much when temperature rised. 800mg·m^-3 waste gas need 250min to penetrate adsorption layer at 10℃ and only need 150min at 50℃, breakthrough curves advanced 100min appearance. Breakthrough curves of 4000mg·m^-3 waste gas moved forward time only 20min when temperature rised 50℃ from 10℃.From the result, the paper considered that arised temperature brought...